SR-7 Spring Brake Valve

The Bendix CVS K021558 SR-7 Spring Brake Valve, sold by Wofford Truck Parts, is a spring brake modulating valve built for dual-circuit air brake systems. It delivers fast spring-brake application for secure parking and emergency response. If a service circuit fails, the SR-7 lets the service brake valve modulate spring brakes for controlled stopping. Its anti-compounding design prevents service and spring forces from stacking, improving brake feel, reducing drag, and protecting components in heavy-duty use.

BENDIX CVS Part No: K021558

$306.70

Specifications

The Bendix CVS SR-7 Spring Brake Valve K021558 is engineered for dual air brake systems with spring brake actuators. During normal parking, it rapidly applies spring brakes using reservoir pressure. If a service circuit loses air, the SR-7 modulates spring brake application through the service brake valve to provide controlled stopping. Its anti-compounding design prevents service and spring forces from stacking, improving brake feel and reducing component stress. Built with standard SR-7 porting and two mounting studs, K021558 is a direct-fit replacement sold by Wofford Truck Parts for dependable heavy-duty parking and emergency brake control.

Weight

2.98

Compatibility

Heavy-duty trucks (multiple OEMs; SR-7 air-brake equipped)
Truck tractors with dual-circuit spring brake systems
Heavy trailers using SR-7-style spring brake modulation
Transit / coach buses with Bendix-pattern SR-7 valves

Alternative Part Numbers

K021558 0091559
060-KO21558
170.K021558
170K021558
21558
5010393
5010914
5010915
5010916
5010917
5011180
5012045
5012046
5013055
5017233
745-K021558
745K021558
801329
AB8463
BWK021558
BXK021558
K021246
K021292
K021293
K021295
K021297
K021442
K021558BXW
K022698
K025932
K041542
K041547
K041894
K043387
K049149
K049151
K049152
K049153
K049154
K049155
K21558
KO21558
S-27028
S27028
SR-7
T5010390